Improved apparatus for bleaching and defecating cane-juice



` llnted ,tiatrt @atleti (dimite.

JOHN O. MARSH, lOF ALEXANDRIA, LOUISIANA, ASSIGNOR TO GEORGE R.

OE SAME PLAGE.

Laim Patent No. 98,285, dated December 2s, .1869.

yrlvrauoviar APPARATUS Fon BLnAcH'ING AND BEFECATING cams-.mien

The Schedule referred to in .these Letters Patent and making part ofl the same.

To all whom itnag/ concern.-

Be it known that I, JOHN C. MARSH, of Alexanldria, in the State of Louisiana, have invented a certain new and useful Improvement in Machines for Bleaching and' Defecating Cane-Juice and I do hereby declare the following to, be a full, clear, and exact description of the saine, reference beingl had to the annexed drawing, making a part of this specification, wbereon a sectional view of it is given.

v My invention has especial reference to the defecation or bleaching of cane-juice, or 'other saccharine liquid, by an infusion and dissemination therein of sulphurous-acid gas. l A

The economy involved in theuse of the fumes of sulphur, in the defecation of cane-juice, as well as the effectiveness of the same as a chemical agent to ac-y complish that object, has given rise to thefabrication of a great 'variety of mechanical arrangements having in view a complete dissemination of such fumes through the juice subjected to their action, for it has long been known that the bleaching of vthe same extends 'onlyto such parts as can be brought in direct contact with the gas.

It does not matter how short the period of contac may be, becausethechemical eect is instantaneous; but there must be a positive contact of the fumes with every particle of the juice, or the defecation isv imperfect. j

No existing sulphur defecating-apparatus, sol far as vmy knowledge extends, is ca'pable of eecting a thorough dissemination or distributionof the fumes throughout 'all' parts of the juice, and hence there is room for improvement as to them all.

My invention discards water-boxes for purifying the fumes, and, in fact, it dispenses with the use of water in every form-for such purpose, for, in my opinion, no such purification is needed; the action of the` lime,

which has to be used in any event, beingsuiiicien't tov f re'e the juice, in the process of evaporation, in the reduction of it into sugar, of sulphuric acid and sublimed sulphur, be the quantity'ot' the same that has been infused into it, in the operation of defecation, greater or lesser.

Nor does my invention require any revolving or otherwise acting mechanical appliances for stirring or agitating the liquid, in order to bring about a dissemination of the gas therein. For it consists of a very simple arrangement ot' pipes, which, providing for the ilowof the gas into the: juice-receiver, at a point in close proximity to the orifice through'which the juice enters the same, enables me to bring to bear a cnrrent of steam to force the gas into the j uicewith such power as to insure a distributionof it throughout the entire mass of the juice, and thus eect a direct con- Gis another side-pipe that enters A a fewY inches behind, or farther from the receiver than does pipeB. Through this side-pipe O, sulphnrous-acid gas passes from the sulphur-furnaceintoA, and thence into the receiver. 1

Betwceli the side-pipes C and B, a hollow truncated cone, D, is placed and fitted, as shown on the drawings, in such a manner as that its open apex will point toward the receiver, and extend under the opening B, as shown.

The object subserved by this appliance is, the reduction of the vent or opening through which the gas is driven, in order that the effect of the current of steam may be increased.

At the end of the sectionof pipe A is a close-fitting diaphragm, E, through which there is a central aperture, provided with a female screw, into which pipe F is litted or screwed. Y

This pipe Fis considerably smaller than' the opening at the apex of the cone D, and it occupies the relation to this cone that is shown on the drawingythat is to say, its extremity, at which thc steam escapes,

is placed-a little behind the point of escape of the gas, in order that the propulsiva force of the steam may be increased. l

Upon `the outside of the diaphragm E is placed a covering head or cup H, through which a central opening,- correspondingwith the 4opening in E, leads into a pipefc, which, in itsturn, connects with the boiler in which the steam is generated that is used inthe operation of the machine. The'head H, infact, constitutes a part of pipe e, being a ila-uch surrounding the e'nd o f 'the same, that connects with the opening through diaphragm E. It is secnredin its place by strong outside straps, &c., that are not shown on the drawing, and being so, holds the diaphragm in its place. Y I

To make the joints in my invention tight, packing of suitable form, of any proper material, may be used 'if necessary.

The operation of my invention is so simple that it is indicated bythe slightest inspection of the drawing,` and hence it will suflice for me to say thatall that isnecessary to apply it to practice, is to make the necessary connections with the receiver, the juice-expression mill, the sulphur-furnace, and the steam-boiler.

I have demonstrated, by experiment, that with my invention the defecation of enne-juice is more perfect than can be eected with any other appara-tus now in general use, and hence I conclude tlhedsseminatvion ot' the gas by it: is nearly, if not perfect, throughout every part of Jche juice.

Having thus described my invention,

What I claim, and desire to secure by Letters Pat ent, is-

`The mode herein described of disseminating sulphurons gases in and through saccharine liquids, when the same is carried into effect by the apparatus herein described, the same being constructed in all its parts and operatngns specified, for the purpose set forth.

lVitnesses: JNO. G. MARSH.

RUFUs R. RHODES, 1I. N. JENKINS. 

